Abstract
Breaking time reversal symmetry of the light flow, implying optical wave isolation and directional light guiding, is crucial for signal handling and integrated optics. Such signal isolation is possible with an optical circulator—a three-port magneto-active nonreciprocal device, which transmits light from any of its input ports into the next port in a circular order, isolating the remaining port. Small magneto-optical activity at optical frequencies challenges the miniaturization and further on-chip integration of this key fundamental component. Here we demonstrate theoretically that by employing principles of plasmonic mode engineering it is possible to enhance significantly magneto-optical response in a deep subwavelength regime and suggest a conceptual approach for a design of an ultracompact nanoscale passive optical circulator. This work paves the way for future generation of nonreciprocal integrated optics with a nanoscale on-chip compatibility.
Highlights
We propose a conceptual approach for design of an ultracompact nanoscale passive optical circulator based on the excitation of plasmonic resonances
In our other work [28] we have shown that plasmonic nanorod structures possessing a rotational symmetry, when immersed in magneto-optical media, exhibit a strong azimuthal symmetry breaking
In this Letter, based on our results from [28] we propose a design for an ultracompact nanoscale plasmonic circulator, exploiting the above-mentioned mechanism of rotation of scattering from subwavelength plasmonic nanorod structure in the presence of MO materials
Summary
We propose a conceptual approach for design of an ultracompact nanoscale passive optical circulator based on the excitation of plasmonic resonances. In our other work [28] we have shown that plasmonic nanorod structures possessing a rotational symmetry, when immersed in magneto-optical media, exhibit a strong azimuthal symmetry breaking.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
